[R] creating a data.frame from scratch

[PIKAL Petr]

Hi

Structure is usefull for exchanging information and it is result of ?dput function. I wonder if anybody would like to use it for **creating** data frames.

For creating data frames see functions like

?read.table,
?read.delim,
or other ?read.* functions.

Your questions are mainly adressed in R-intro which should be part of your R installation.

Cheers
Petr

> -----Original Message-----
> From: R-help <r-help-bounces using r-project.org> On Behalf Of Drake Gossi
> Sent: Saturday, April 20, 2019 1:40 AM
> To: r-help using r-project.org
> Subject: [R] creating a data.frame from scratch
>
> Hello everyone,
>
> Is there any way to create a data.frame from scratch? other than, say, this?
>
> > structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label =
> c("apple",
> "banana", "kiwi", "orange", "pear"), class = "factor"), Color = structure(c(3L, 4L,
> 1L, 2L, 1L), .Label = c("green", "orange", "red", "yellow"
> ), class = "factor"), Shape = structure(c(3L, 1L, 2L, 3L, 3L), .Label = c("oblong",
> "pear", "round"), class = "factor"), Juice = c(1, 0, 0.5, 1, 0)), class =
> "data.frame", row.names = c("1", "2", "3", "4",
> "5"))
>
>
> which yields
>
>    Fruit  Color  Shape  Juice
> 1  apple    red  round  1.0
> 2 banana yellow oblong   0.0
> 3   pear  green   pear   0.5
> 4 orange orange  round   1.0
> 5   kiwi  green  round   0.0
>
>
> I get *that* it works. I just don't know *how* it works, and whether or not
> there is another, easier way...
>
> For example,
>
> > structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label =
> c("apple", "banana", "kiwi", "orange", "pear") ...
>
>
> What on earth are these numbers? c(1L, 2L, 5L, 4L, 3L)? and why are they out
> of order?
>
> And then why put the fruits out of order? c("apple", "banana", "kiwi",
> "orange", "pear")? since that's not a descending order?
> since, in the final data.frame, it goes apple, banana, *pear*, *orange*, kiwi?
>
> So many questions!
>
> Drake
>
> [[alternative HTML version deleted]]
>
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